package com.kdg.juc;

/**
 * Created by kong on 2017/7/27.
 */
public class TestProduckorAndConsumer {
    public static void main(String[] args) {
        Clerk clerk = new Clerk();

        Productor productor = new Productor(clerk);

        Consumer consumer = new Consumer(clerk);

        new Thread(productor,"生产者A").start();
        new Thread(consumer,"消费者B").start();

        new Thread(productor,"生产者C").start();
        new Thread(consumer,"消费者D").start();
    }
}

class Clerk {
    private int product = 0;

    //进货
    public synchronized void get() {
        while (product >= 1) {
            System.out.println("产品已满");
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        } //else {
            System.out.println(Thread.currentThread().getName() + ":" + ++product);
            this.notifyAll();
        //}
    }

    //卖货
    public synchronized void sale() {
        while (product <= 0) {  //为避免虚假唤醒 应该总是使用在循环中
            System.out.println("缺货");
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        } //else {
            this.notifyAll();
            System.out.println(Thread.currentThread().getName() + ":" + --product);
//        }
    }
}
//生产者
class Productor implements Runnable{
    private Clerk clerk;

    public Productor(Clerk clerk){
        this.clerk = clerk;
    }
    @Override
    public void run() {
        for(int i=0;i<20;i++){
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            clerk.get();
        }
    }
}

//消费者
class Consumer implements Runnable{
    private Clerk clerk;
    public Consumer(Clerk clerk){
        this.clerk = clerk;
    }

    @Override
    public void run() {
        for(int i=0; i<20; i++){
            clerk.sale();
        }
    }
}
